10 



NATURAL HISTORY OF INSECTS. 



These animals are readily distinguished by their jointed 

 appearance, which is easily seen in the Caterpillar (Fig. 2) as 

 it moves along. 



III. SOFT-BODIED ANIMALS (Molusca), such as Snails, Clams, 



Slugs (Fig. 3), etc.; these do not have the body divided into 



joints, nor are they furnished with either an internal or external 



skeleton, although they are sometimes inclosed in a hard cov- 



ering or shell. 



Fig. 4 



Fig. 5 



IV. RAYED ANIMALS (Radiata), such as Star-Fishes, etc.; 

 these have the parts of the body radiating from the center, 

 resembling somewhat an asterisk (*); they are found only in 

 the water. 



Insects belonging to the second division of the Animal King- 

 dom, called Articulata. This division or Sub-Kingdom, com- 

 prises five Classes, which differ from each other chiefly in the 

 number of legs which they possess in the adult or perfect state. 

 These five Classes are as follows: 



Fig. 7. 



I. TRUE INSECTS (Insecta), such as Beetles, Butterflies, etc.; 

 which are furnished with six legs, as the Goldsmith Beetle 

 (Fig. 4). 



II. SPIDERS (Arachnida), such as Spiders, Cheese-mites, 



